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本文研究了锰与漂蓝6B,α,α＇-联吡啶和溴化十六烷基三甲铵在pH9.5～10.5区间生成绿色四元配合物。四元配合物的最大吸收波长在625nm外,摩尔吸光系数为8.3×10~4,锰量在0~15μg/25ml范围内遵守比尔定律。四元配合物的组成是Mn:ECAB:α,α＇-dipyridyl:CTMAB=1:2:2:3。许多常见离子不干扰,但稀土元素严重干扰测定。方法能用于钢样及硫酸钴中锰的测定,获得了满意的结果。
In this paper, the green quaternary complexes of Mn and bleached blue 6B, α, α’-bipyridyl and cetyltrimethyl ammonium bromide were studied in the range of pH 9.5 ~ 10.5. The maximum absorption wavelength of the quaternary complex is 625nm, the molar absorption coefficient is 8.3 × 10 ~ 4, and the Beer’s law is obeyed in the range of 0 ~ 15μg / 25ml. The composition of the quaternary complex is Mn: ECAB: α, α’-dipyridyl: CTMAB = 1: 2: 2: 3. Many common ions do not interfere, but rare earth elements seriously interfere with the determination. The method can be used for the determination of manganese in the steel sample and cobalt sulfate, and satisfactory results have been obtained.